[ 72.516070][ T26] audit: type=1800 audit(1565529524.465:27): pid=10257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 72.567813][ T26] audit: type=1800 audit(1565529524.555:28): pid=10257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.359152][ T26] audit: type=1800 audit(1565529525.345:29): pid=10257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 73.379609][ T26] audit: type=1800 audit(1565529525.355:30): pid=10257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.905734][T10409] ================================================================== [ 82.913853][T10409] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 82.921123][T10409] Write of size 4 at addr 0000000000000010 by task syz-executor522/10409 [ 82.929567][T10409] [ 82.931885][T10409] CPU: 0 PID: 10409 Comm: syz-executor522 Not tainted 5.3.0-rc3+ #157 [ 82.940041][T10409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.950081][T10409] Call Trace: [ 82.953430][T10409] dump_stack+0x172/0x1f0 [ 82.957758][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 82.962679][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 82.967604][T10409] __kasan_report.cold+0x5/0x36 [ 82.972439][T10409] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 82.978271][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 82.983200][T10409] kasan_report+0x12/0x17 [ 82.987555][T10409] check_memory_region+0x134/0x1a0 [ 82.992654][T10409] __kasan_check_write+0x14/0x20 [ 82.997569][T10409] rxrpc_unuse_local+0x23/0x70 [ 83.002327][T10409] rxrpc_release+0x47d/0x840 [ 83.006902][T10409] __sock_release+0xce/0x280 [ 83.011481][T10409] sock_close+0x1e/0x30 [ 83.015611][T10409] __fput+0x2ff/0x890 [ 83.019574][T10409] ? __sock_release+0x280/0x280 [ 83.024434][T10409] ____fput+0x16/0x20 [ 83.028407][T10409] task_work_run+0x145/0x1c0 [ 83.032987][T10409] do_exit+0x92f/0x2e50 [ 83.037135][T10409] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 83.043369][T10409] ? mm_update_next_owner+0x640/0x640 [ 83.048737][T10409] ? fd_install+0x4d/0x60 [ 83.053067][T10409] ? __sys_socket+0x180/0x220 [ 83.057733][T10409] ? move_addr_to_kernel+0x80/0x80 [ 83.062832][T10409] ? __ia32_sys_fallocate+0xf0/0xf0 [ 83.068042][T10409] do_group_exit+0x135/0x360 [ 83.072618][T10409] __x64_sys_exit_group+0x44/0x50 [ 83.077650][T10409] do_syscall_64+0xfd/0x6a0 [ 83.082139][T10409] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.088018][T10409] RIP: 0033:0x43ed68 [ 83.091901][T10409] Code: Bad RIP value. [ 83.095942][T10409] RSP: 002b:00007ffe7b01ac28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 83.104334][T10409] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 83.112288][T10409] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 83.120243][T10409] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 83.128206][T10409] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 83.136181][T10409] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 83.144150][T10409] ================================================================== [ 83.152941][T10409] Kernel panic - not syncing: panic_on_warn set ... [ 83.159545][T10409] CPU: 0 PID: 10409 Comm: syz-executor522 Tainted: G B 5.3.0-rc3+ #157 [ 83.169069][T10409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.179125][T10409] Call Trace: [ 83.182520][T10409] dump_stack+0x172/0x1f0 [ 83.186928][T10409] panic+0x2dc/0x755 [ 83.190889][T10409] ? add_taint.cold+0x16/0x16 [ 83.195549][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 83.200470][T10409] ? preempt_schedule+0x4b/0x60 [ 83.205301][T10409] ? ___preempt_schedule+0x16/0x20 [ 83.210396][T10409] ? trace_hardirqs_on+0x5e/0x240 [ 83.215403][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 83.220365][T10409] end_report+0x47/0x4f [ 83.224531][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 83.229463][T10409] __kasan_report.cold+0xe/0x36 [ 83.234297][T10409] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 83.240091][T10409] ? rxrpc_unuse_local+0x23/0x70 [ 83.245023][T10409] kasan_report+0x12/0x17 [ 83.249338][T10409] check_memory_region+0x134/0x1a0 [ 83.254434][T10409] __kasan_check_write+0x14/0x20 [ 83.259378][T10409] rxrpc_unuse_local+0x23/0x70 [ 83.264138][T10409] rxrpc_release+0x47d/0x840 [ 83.268711][T10409] __sock_release+0xce/0x280 [ 83.273286][T10409] sock_close+0x1e/0x30 [ 83.277423][T10409] __fput+0x2ff/0x890 [ 83.281390][T10409] ? __sock_release+0x280/0x280 [ 83.286218][T10409] ____fput+0x16/0x20 [ 83.290197][T10409] task_work_run+0x145/0x1c0 [ 83.294768][T10409] do_exit+0x92f/0x2e50 [ 83.298905][T10409] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 83.305057][T10409] ? mm_update_next_owner+0x640/0x640 [ 83.310412][T10409] ? fd_install+0x4d/0x60 [ 83.314734][T10409] ? __sys_socket+0x180/0x220 [ 83.319393][T10409] ? move_addr_to_kernel+0x80/0x80 [ 83.324519][T10409] ? __ia32_sys_fallocate+0xf0/0xf0 [ 83.329711][T10409] do_group_exit+0x135/0x360 [ 83.334311][T10409] __x64_sys_exit_group+0x44/0x50 [ 83.339329][T10409] do_syscall_64+0xfd/0x6a0 [ 83.343816][T10409] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.349692][T10409] RIP: 0033:0x43ed68 [ 83.353570][T10409] Code: Bad RIP value. [ 83.357611][T10409] RSP: 002b:00007ffe7b01ac28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 83.366009][T10409] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 83.373979][T10409] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 83.381941][T10409] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 83.389897][T10409] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 83.397855][T10409] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 83.407081][T10409] Kernel Offset: disabled [ 83.411430][T10409] Rebooting in 86400 seconds..